Suction cleaner



May 9, 1933. L. w. PARDE 1,907,861

sUcTIoN CLEANER Filed April 17, 1930 mllllmm ulm] INvELNT'QR f3 A 4 I Lleg.

ATT? R Naive Patented May 9, 1933 UNITED STATES PATENT ori-ics LLOYD W. PAREE, F LAKEWOOD, OHIO, ASSIGNOR TO THE SCOTT AND FETZER COM- PANY, OF CLEVELAND, OHIO, A CORPORATION 0F OHIO SUCTION CLEANER Application ined April 17, 1930. Serial No. 444,958.

This invention relates to elastic suction- 'cleaners of the portable type and has for its object the provision of a safetydevice to protect the user against injury to hands or clothing under certain conditions of operation.

Fig. 1 is a side elevation of an illustrative form of cleaner, p artly in section, showing the same equipped with a removable floor-nozzle; Fig. 2 is a side elevation of a hose-connection which can be used interchangeably with said nozzle; Fig. 3 is a detail sectional view corresponding to the line 3-3 of Fig. 1 Fig. 4 is a view of the switchparts similar to that in Fig. 3 but showing the switch open; Fig. 5 is a `detail sectional view taken on the line 5 5 of Fig. 3 and Fig. 6 is a perspective view of the separated switch-parts- Suction-cleaners of this type comprise a fan-casing 1 and motor-housing 2 located adjacent eachother, a centrifugal-fan 3 in the fan-casing being carried by the armature-shaft of an electric-motor inside the housing 2 whereby itis rotated, and the face of the fan-casing opposite the motor housing being formed with an inlet-aperture 4. In the particular form of machine to which'the present invention relates a floor-nozzle 5 and an extension-hose-connection 6 are provided, together with means whereby they can be attached to the casing selectively. In the present embodiment this means comprises a cross-bar 7 rigidly attached to the face of the casing 1 at one side of the opening 4 and adapted to be engaged by suitable brackets 8 carried by the nozzle and hose connection, the face of the fan-casing opposite this crossbar being provided with a cam-button 9 to engage the attached member and force it into the opening. When this attached member is removed the fan is directly exposed, and experience shows that even though an electric-switch 10 be provided on the cleaner in some easily accessible position, still in a great many instances the user neglects to open it and stop the fan before removing the nozzle or hosefcoupling whereupon it is notuncommon for articles of dress like skirts 5o or aprons to be sucked into the opening, and

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bodily injury to the fingers 'of the operator or of inquisitive children can occur since the speed of the fan is so great that its blades are invisible According to my invention these dangers are avoided by the provision of an automatic switch so located that upon the removal of the attached-member the circuit to the electric-motor is interrupted regardless of the setting of the switch 10. In the form of the invention showfn in these drawings the cross-bar 7 is carried by a hollow bracket 12 which is also in the present emto make engagement with the two springs,

as shown in Figs. 3 and 5, and thereby establish electrical connection between. the wires 21-21 which lead from the switch 10 to the driving motor. A suitable spring 22 is also provided by which said block is moved into open circuit position as shown in Fig. .4 when theattached member is removed; the attached part is formed to contact with this block 18 and move it into circuit-closing position automatically so as to permit the motor to be operated when the switch 10 is properly adjusted. I have shown the nozzle 5 as provided with a linger 23 for the purpose although the side wall is enough or any other conformation can be used.

It will be understood that many' changes in the details of construction of the switch lcan be made and in the manner of its actuation by the attachment member, .wherefore I do not limit myself to the details herein described except as the same are specifically recited in my several claims which I desire carried naked opening located c osely adjacent to said blades, a fioor nozzle removably secured to said casing, said nozzle having a part fitting said inlet opening and also having an in et mouth, means for supporting said casing with said mouth presented to the sup ortin surface in operative relation, an an e ectric switch carried by said casing in series with said motor, said switch having a movable part pro'ecting into n position to be engaged and isplaced by a part of said nozzle and restoring` means for the movable part of said switch whereby the circuit through said motor is opened autof niatically upon the removal of said nozzle A from said casing and is closed u pon the application of said nozzle to said casing.

2. In a suctlon cleaner, a fan chamber .having a substantially lnaked inlet opening in one wall and an electric motor located outside of the opposite wall, a fan in said chamber closely ad'acent to the opening thereof and driven y said motor, a removable hollow fioor tool adapted to engave the first named wall in communication with said inlet opening, means for securing said tool detachably to said wall in front of said inlet openin an electric switch connected in series wit said motor having a lnovable part projecting into a position to be engaged and displaced by a art of said tool whenever said tool is attac ed over said inlet opening, 'and means to operate said movable part in a reverse direction whereby the circuit'through the motor is opened automatically whenever said inlet opening is nncovered, and automatically restored whenever said tool is attached.

3. In a suction cleaner, a fan chamber having a centrifugal fan inside and a naked inlet opening in one wall immediately adjacent to said fan, an electric motor operatively connected to said fan and located upon the side away from said inlet opening, a manually operable switch carried by a part of said suction cleaner and operatively connected in circuit with said motor, a hollow member adapted to lit said inlet opening, means for securing said member in front of said opening, and a second switch connected in circuit with said motor additionally to said first mentioned switch and comprising a movable member ada ated to open the motor circuit upon the displacement of said hollow member away from said inlet opening and to close the circuit through said motor, exceptin for the lirst mentioned switch, nponvt e ap lication of said hollow member to said inlet openin In testimony whereof I hereunto a x my signature.

LLOYD W. PARDEE. 

